Liquid circulating devices for use with drilling machines for drilling stone or concrete consisting of a circulating pump, tubes and a liquid container for preventing dust scattering, reducing heat generation of the drilled object, and suppressing noise generation; liquid circulating devices for use with machines for drilling tiles consisting of a circulating pump, tubes and a liquid container for preventing dust scattering, reducing heat generation of the drilled object, and suppressing nois...

apparatus for laundry water recycling in the nature of a closed-loop system that recovers heat energy from laundry wastewater by recycling all wastewater through high level filtration